Apparatus for removing sediment from steam-boilers



(No Model.) 2 Sheets-Sheet 1.

J. WATT. APPARATUS FOR REMOVING SEDIMENT FROM STEAM BOILERS. No. 586,805. Patented July 20,1897.

744/3 68 acres,

(No Model.) 2 Sh'ets-Sheet 2.

J. WATT. APPARATUS FOR REMOVING SEDIMENT FROM STEAM BOILERS.

No. 586,805. Patented July 20, 1897.

UNiTED STATES PATENT OEEIcE.

JOHN IVATT, OF BIRKENHEAD, ENGLAND, ASSIGNOR TO \VILLIAM IRVING, OF CHICAGO, ILLINOIS.

APPARATUS FOR REMOVING SEDIMENT FROM STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 586,805, dated July 20, 1897. Application tiled February 16, 1897. Serial No. 623,740- (No model.) Patented in England [lune 4, 1888, No. 8,078.

To all whmn (it may concern:

Be it known that I, JOHN WATT, a subject of the Queen of Great Britain, residing at Birkenhead, in the county of Chester, England, have invented certain new and useful Improvements in Apparatus for Removing Sediment from SteanrBoilers, (for which I have obtained British Patent No. 8,078, dated June 4,1888,) of which the following is a specification.

This invention relates to an apparatus for causing or increasing a circulation of the water in steam-boilers during ebullition, whereby sediment is removed from the boiler and the water thereof is purified.

I will describe my invention as it may be applied to an ordinary horizontal boiler having one or more internal furnace tubes or fiues, although it may be applied to boilers of various forms.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of a horizontal boiler containing my invention; and Fig. 2 is a front elevation thereof, partly in section, also showing a sediment-collector in section. Fig. 3 shows the invention applied to a steamboiler having alarge centrally-lo cated tube or flue. Figs. 4, 5, and 6 are detail views showing various forms of jet-pum p used in connection with my device.

In the drawings, 1 represents the boilershell, and 2 the furnace tubes or lines.

3 represents a vapor-collector, which, as shown, is a wide-mouthed vessel placed in an inverted position within the boiler-space be low the water-line and connected to the delivery-pipe 7, which may have the trough 8 therein, and leads to the sediment'collector 10. Said sediment-collector has the returnpipe 11, communicating with the boiler-space below the Water-line.

5 represents a sediment-collectin g pipe arranged near to and parallel with the bottom of the boiler, but supported out of contact therewith and having apertures 15 in its end and lower side. This pipe may terminate near the back end of the boiler, but is preferably turned upwardly, as at 16, and is 0011- nected with a scum-pan 26. (See Fig. 1.) The pipe 5 has a riser 17, which terminates in a jet or nozzle 6, arranged axially with reference to pipe 7. a is a pipe arranged concentric to the nozzle (3 and the orifice of said nozzle and the annular passage between it and the pipe 4 communicate with the deliverypipe 7 at their discharge ends and with the sediment-collecting pipe and the interior of the vapor-collector 3 at their receiving ends, respectively.

The construction above described is that shown in Fig. 1 of the drawings and is the preferred construction, although I may employ the modifications shown in Figs. at, 5, or (5, but in all of these constructions the same general principle is employednamely', that of a jet-pump having a central delivery-passage, such as that formed by the pipe 6 with a concentric annular passage or a concentrically-arranged series of passages. Thus in Fig. 4 the upper end of pipe 6 terminates close to the wall of the delivery-pipe 7. In Fig. 5 a series of jet-tubes 9 are arranged concentrically to the pipe 6, while in Fig. 6 the conical plug 12 controls the jet.

The action of the apparatus is as follows: Steam accumulates in the vapor-collector 3 and issues in the form of a jet or jets through the passage or passages surrounding the nozzle 6. The passing of the steam in the form of a jet or jets induces a current of water upwardly through the riser-pipe, horizontally through the pipe 5, lying on the bottom, and thus causing the Water and sediment to pass into such pipe through the apertures in the bottom thereof, and the scum and other floating impurities are collected in the scum-pan 26 and are drawn downwardly into the pipe 5 and thence lifted through the riser-pipe and discharged by the jet into the sediment-chamber 10, the purified Water returning to the boiler through the pipe 11. The steam which passes by way of the jet may be liberated in the open trough 8, while the current of water carrying the sediment will pass through the trough to the sedimentchamber. In the construction shown in Fig.

2 the riser of the pipe 5 is vertically arranged. As shown in Fig. 3, however, said pipe is curved to pass around the large flue and the stack of tubes 17, and the jet-pu mp is of the construction shown in Fig. 4.

To attain the best results with my invention, the vapor-collector is placed at that point in the boiler where ebullition is most violent, and said vapor-collector is of course so located that the entrance to or mouth thereof is below the water-level. This vapor-collector is shown in the form of a rectangular vessel, but it may be in the form of a pipe extending horizontally of the boiler near the water-level and with the openings thereof submerged. When the water is boiling the vapor-collector and the passage connecting it with the delivery-pipe become filled with steam, which displaces the water. The pressure of the steam being equal to the pressure of the water at the level of the mouth of the vapor-collector, the pressure will be somewhat in excess of the pressure at the level of the steam-nozzle, and the steam which is col lected will consequently issue through the annular passage as a jet. This jet of steam will set the water in the riser-pipe in motion, and a current of water will therefore be es tablished from near the water-level through the scum-pipe 26, downwardly to the pipe 5, upwardly through the riser-pipe, and outwardly through the delivery-pipe 7 to the sediment-chamber for purification and subsequent return to the boiler.

It will be observed, therefore, that my invention includes, in addition to the means for generating a current of Water by the aid of a jet of steam, the further idea of and means forcollecting the impurities from near the top of the water and also from the bot tom of the boiler and raising said impurities through the body of the water and the passage, conducting them into the sedimentchamber.

The apparatus hereinabove described I have found to be highly efficient for the purifica-tion of the water of steam-boilers and adequate to meet the requirements of waterpurifiers under Widely-varying conditions.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus for removing impurities from water in steam-boilers, the combination of a vapor-collector having an opening thereto so located as to be submerged in the liquid when in use, a sediment-collecting tube located near the bottom of the boiler and dis charging beneath said vapor-collector, a de livery-pipe connected to the upper side of the vapor-collector and having its orifice in line with the discharge-orifice of the sediment tube and a passage or passages connecting the interior of the vapor-collector with the delivery-pipe and arranged concentric to the discharge end of the sediment-tube whereby a circulation of water may be caused or increased, substantially as described.

2. In an apparatus for causing or increasing a circulation of Water during ebullition, the combination with a boiler of a sedimentcollector connected with the boiler-space by delivery and return pipes, a vapor-collector located within the boiler-space and having the openings thereof adapted to be submerged in the liquid, a sediment-collecting tube arranged to discharge interiorly of the vaporcollector and a steam passage or passages arranged concentric to the discharge-orifice of the sediment-tube and connecting the vaporspace with the delivery-pipe, substantially as described.

3. In a water-purifier the combination with a steam-boiler of a sediment-collector and delivery and return pipes connecting with the boiler-space, of a vapor-collectorconnected to the delivery-pipe and having steam-jet orifices, a sediment-collecting tube extending along the bottom of the boiler and discharging within the vapor-collector axially of the steam-jet orifice, and a collector of suspended impurities arranged near the surface of the water and connected with the sedim ent-tube, substantially as described.

- JOHN \VATT.

Witnesses:

\VM. PIERCE, S. MCCREADY. 

